Improvement in alarm stop-movements for time-pieces



H. J. WENZEL.

Alarm Stop-Movements for Time-Pieces.

Patented March I7, 1874.

UNITED STATES PATENT EEICE..

HERMANN J. VVENZEL, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN ALARM STOP-MOVEMENTS FOR TIME-PIECES.

Speeiiication forming part of Letters Patent No. 148,636, dated March 17, 1874; application filed September 25, 1873.

To all 'whom it may concern:

Be it known that I, HERMANN JULIUs NVEN ZEL, of San Francisco, in the State of California, have invented an Improvement in Alarm Stop-Movements for Timelieces, of which the following is a speciiication:

Stop-movements havebeen applied to springbarrels and the Winding mechanism in timepieccs of various characters. These have been made to prevent the spring or barrel being Wound up too far, and also to stop the rotation of the barrel when the barrel has been un Wound, and thereby stop thc clock running down too far. It is usual to wind these time-pieces periodically, either Weekly or monthly, and it frequently happens that the attendant forgets to wind the same at the proper time; hence such time-pieces will run eight or nine days or thirtythree or thirty-four days.

The object of my present invention is to sound an alarm periodicallywsay, every hour after the regular time for winding has passcdand which alarm is continued out of action or lthrown out of action by the act of winding,

so that it cannot sound the alarm except during the period elapsing after the win din g ought to have taken place and before the clock iinally stops. l

In thc drawing, Figure l is an elevation of the stop-Works with the parts in. their normal position and the hammer for the bell held back out of action 5 and Fig. 2 shows the same parts after the Winding period has passed neglected and the hammer is freed for striking the alarm 5 and Fig. 3 is a plan of the parts.

The shaft a represents either the barrel-shaft, the spring shaft, or a winding arbor acting upon the barrel or spring to Wind the time' piece; and b is a Wheel ofthe clock-Work partially removed in Figs. l and 2, said Wheel b and shaft a being connected by the ratchet and pawl c. Upon the shaft a is a tooth, fi, that acts upon the stop-Wheel d to move the same progressively, the blank space 2 of such Wheel forming a stop for the tooth when the clock is woundup, and also preventing further movement when the spring or Weight is run down. These parts thus i'ar may be of any usual character, and they are to be adapted to the clock with Which they are to be used. The lever or detent c upon the fulcrum 4 forms a latch to hold the hammer f in the position shown in Fig. l, so that the hammer cannot fall and strike a bell or give an alarm so long as the lever c is inthe position shown in said Fig. l, but so soon as the Wheel d is brought around progressively by the tooth 'i as the clock runs down, so that the pin 5 upon said Wheel d moves the lever-detent c the hammer is unlatched and the pins 7 upon the Wheel b raise the hammer-tail j" periodically, and allow the hammer to fall and give the alarm 5 therefore, if the parts are properly constructed and positioncd the alarm Will only be sounded after the proper period for Winding the clock has passed, and the alarm will be sounded hourly or at other intervals until the clock stops or is Wound. lVhen the winding takes place thc Y pin 5 is Withdrawn from contact With the lever c, leaving the same free to catch the hammer and hold it up when lifted by the pin 7 acting upon the hammer-tail f.

I claim as my invention- The detent c, forming a latch for the alarm f, to hold the same out of action until the time arrives for winding, in combination with the stop-Wheel d and tooth c' upon the Winding'- shaft, and pin 5, or its equivalent, to move said detent e, substantially as and for the purposes set forth.

Signed by me this 20th day of September,

HERMANN J. WENZEL. Witnesses:

GEO. T. PiNoKNEY, CHAs. H. SMITH. 

